In January, Jimmy Page announced the launch of Sundragon amps, a new business selling a limited edition amplifier which recreates the original Supro Coronado amp that Page used during his time in Led Zeppelin.

So far, the business has been relatively quiet. The company is releasing 50 hand-signed amps, and plans to release a wider production run later in 2019.

But a trademark filing by the business at the start of May shows that Sundragon is planning to produce its own merchandise.

The company applied on May 2 to trademark the phrase “Sundragon” for a T-shirt line in the US. The patent application has not yet been approved.

Sundragon has already trademarked its brand name for use in guitar amplifiers, but the new filing shows that the company has larger plans for its brand.

Mitch Colby, one of the directors of the business, said in an interview earlier this year that the limited edition version of the amp sold out within days. The amps sold for $12,000, according to online reports.

“I had been impressed with the forensic analysis both Mitch and Perry had put into the research of the sonic reproduction of the original Supro amp to arrive at the Sundragon,” Page said in a statement on the Sundragon website earlier this year.